Look if you can hold out until you get to the Water 7/Ennies Lobby Arc, you will never regret watching One Piece. Just my 2 cents worth. If you really don't like it or can't hold out, then One Piece really isn't for you. The first time I saw One Piece I thought it was a kids show. Then again, it was the crappy Funimation version that came on Cartoon Network and I watched less than 5 mins. of it bc I thought it was stupid.

Boy was I wrong, when I bought the DVD. The japanese subbed version is 1000x better.

water 7 and ennies lobby were okay although it got really slow and it dragged on when they were trying to get robin back. the scene where the strawhats stand on the tower and confront robin was sick but it just couldn't make up for all the boring bits, i think one piece is very non consistent.

I'd say that the one piece anime is pretty poor.
Bad pacing, bad animation and dragged out; but at least there are very few fillers.
Read the manga if anything, it will give you the full story in a much more concise way

One piece is very interesting but if it boars you don't watch it. I will say if you are all caught up and you have ended up watching over 600 episodes its hard to just drop it, especially when there is so many things we have yet to find out.

I just got caught up on a years worth of One Piece. That whole year was basically just the Fishman Island Arc, so yeah...I get what you mean when it comes to pacing and how incredibly slow the story moves along. But yeah, if you've made it this far, then you'll be doing yourself a disservice to quit watching before the Impel Down and MarineFord Arcs. Honestly, it feels like the show matures quite a bit. Anyways, I've long since dropped Naruto, Bleach and Fairy Tail, and couldnt get past the first ep of Gintama. One Piece is the only shonen anime that I can say I truely enjoy. Oda-Sensei is a genius.

would never watch a series that takes "a few arcs" to "get good" when I could watch other series that take up that many episodes or less and are consistantly good.

That's a shame, because I'm sure you've missed out and some very good series.
I guess the reason people say it takes a couple of arcs to get good is because the characters aren't introduced in an episode, like other anime. In One Piece, each main character is introduced in it's only multi-episode story arc. Therefore, it gets better as more characters are added and we get to see the various interactions of the crew. I don't think this is a flaw at all. In fact, knowing the back stories of these characters right off the bat makes you start loving them right from the start.

listen i'm talking about 2 things completely different, what i ranted about in one piece was bullshit such as zoro slashing fodder with his swords and they all get knocked out without any gashes or blood and this happened more times then i could remember, and bull like sanji (a normal human) during a fight when he's beaten down decides to spin like crazy making his RIGHT leg only caught on fire then he uses that leg to defeat his enemy after he's done his leg conveniently goes back to normal without his trousers getting burned or anything and without him even feeling the heat. this is the kinda of bullshit im talking about BENDING THE RULES YOU'VE SET FOR YOUR STORY. because it's unheard of that NORMAL humans in one piece can do extraordinary things.

as for attack on titan there hasn't been any breaching of the rules the author set in the first place if you wanna compare both then just like a devil fruit can transform you into an animal in ONE PIECE, an injection can turn you into a titan in SHINGEKI NO KYOJIN.